With the water restrictions on around the country it's a wonder these aren't made compulsory. A good solar blanket can stop 95% of evaporation, as well as warm the water up by 6 degrees Celsius, as well as keep most debris out of the pool. This is a must have item for any pool.
There are different warranties available so get the longest warranty available depending on how long you plan on staying in that house. A blanket with double the warranty won't be double the price.
There are brackets available to install blanket rollers on above ground pools. Blankets can be taken on and off manually but a roller makes the job so much easier and quicker, and it keeps things tidy.
Alternatively there are "Leaf stop" mesh covers that fit over the pool like a big shower cap. They simply keep debris out and will not stop evaporation or warm the water up.